乙基纤维素

【英语时差8,16】蘑菇也能变为柴油？

Don: Time to go again to the A Moment of Science mailbag. Yal: A listener writes: Dear A Moment of Science, Scientists know that one day we'll run out of oil and other natural sources of energy. Beyond solar power and wind power and ethanol, what are

发表于:2018-12-27 / 阅读(52) / 评论(0)

英语时差8，16

SSS 2008-05-08

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This'll just take a minute. It sounds like something out of a bad science fiction novel. During World War II, a fungus called Tricoderma reesei ate its way through US military unifo

发表于:2019-01-08 / 阅读(60) / 评论(0)

Scientific American(五)月

VOA标准英语2011--Automakers Turn Agro-Waste into Car Part

Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl

发表于:2019-01-09 / 阅读(61) / 评论(0)

VOA标准英语2011年(四月)

VOA慢速英语2014 烟头转变成电池

Turning Cigarette Butts to Batteries 烟头转变成电池 If you see a person carelessly throw a cigarette to the ground, what are you likely to think? That depends. If you hate people throwing things on the ground, you might think, That person shou

发表于:2019-01-12 / 阅读(70) / 评论(0)

2014年VOA慢速英语(九)月

万物简史第225期:把铅撵出去(14)

By counting back through these layers and measuring the amount of lead in each, he could work out global lead concentrations at any time for hundreds, or even thousands, of years. The notion became the foundation of ice core studies, on which much mo

发表于:2019-02-17 / 阅读(59) / 评论(0)

万物简史

TED演讲获奖青少年,科技在行动(1)

If you were going to a restaurant and wanted a healthier option, 如果你去饭店，你想吃得健康一点， which would you choose, grilled or fried chicken? 你会选择哪种食品呢，烤鸡还是炸鸡？ Now most people would answer grill

发表于:2019-02-21 / 阅读(68) / 评论(0)

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acutifolium

air velocity at work place

Allen bolts

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